If you have made it this far you are no longer a beginner! Chromosome Mapping is for the serious genetic genealogist. It can be time consuming, but also very rewarding. Since writing this back in 2011 there are many new tools to make it easier. Chromosome mapping is the only way to truly know that a segment of DNA comes from an identified ancestor or ancestor pair. It is the process genetic genealogists use to track matches and then confirm our matches’ relationship to us. You may need to collect quite a bit of data before using the mapping tools. Ancestry’s Common Ancestor and ThruLines and My Heritage’s Theory of relativity are attempts to automatic the process. As is MyHeritage’s Auto Clusters.
You paint a match by entering data from 23andMe, FTDNA, MyHeritage of GEDMATCH into the Paint a Match Field. Then you assign a category. You get to choose the category and the color used. I use warm colors for my Mother’s side and cool colors for my Father’s side. You can also change the segment size to include. For instance you might download a match at FTDNA and want to exclude segments under a given threshold like 5 or 7 cM. (FTDNA includes very small segments).
This is a closer look at my Key for the categories I have.
You can see I have included categories for Unknown Paternal, Unknown Maternal and Pending and unknown. Individuals with more than one spouse offer the opportunity to assign the match to a specif individual when you match someone who is the descendant of a different spouse (1/2 cousin). If you are serious about “proving” your matches, I highly recommend using DNAPainter.
You can periodically download your matches from FTDNA, 23andme and MyHeritage and organize them in your own spreadsheet or use the tools that that DNAGEDCOM make available. There is a Registration and cost involved but you may find this worthwhile. I used to keep a spreadsheet but now keep my matches in DNAPainter.
Jworks and K works toolsfrom DNAgedcom.com
Find New ancestors with DNA. by Shari Simonds
Making a Spreadsheet of your Autosomal Matches by Kitty Munson Cooper
Kitty’s Downloads for Spreadsheets by Kitty Munson Cooper
Kitty Munson’s Chromosome Mapping Tool by Kitty Munson Cooper
Kitty Munson’s Segment Mapping by Kitty Munson Cooper
Step by step guide to using the Chromosme Mapping Tool by Rebekah Canada
Your Gentic Genealogist Chromosome Mapping by CeCe Moore
Triangulation for Autosomal DNA by Roberta Estes
Autosomal Me by Roberta Estes
Kelly Wheaton Copyright 2020. All Rights reserved.